Abstract: A composite hollow aspirator shaft is formed of fiberglass-reinforced phenolic resin that resists abrasion and reduces the amount of vibration that is transferred to the motor rotating the shaft, and the motor's bearings to extend motor and bearing life. An aspirator tip is adhesively attached to the composite aspirator shaft and includes an access hole for cleaning inside the hollow aspirator shaft. The hole is in axial alignment with the hollow aspirator shaft and a selectively-removable plug is used to seal the hole during aspirator use. When the aspirator tip is rotated in a liquid, fluidic forces are transferred to the shaft where they are attenuated. A splined hub is used to attach a foam restrictor near the other end of the shaft. The composite shaft material has a flexural modulus, or ratio, within the elastic limit of any applied stress.

Abstract: A composite hollow aspirator shaft is formed of fiberglass-reinforced phenolic resin that reduces the amount of vibration that is transferred to the motor rotating the shaft, and the motor's bearings. This extends motor and bearing life. When the aspirator tip is rotated in a liquid, fluidic forces are transferred to the shaft. Rather than transmitting those forces into the motor and its bearings, the composite aspirator shaft attenuates the forces to prevent most of them from reaching the motor and its bearings. The composite shaft material has a flexural modulus, or ratio, within the elastic limit of any applied stress, and is sufficiently low to allow the transfer of the flexural or oscillatory energy into heat within the shaft instead of conveying the energy in the form of vibration/oscillations along the axial length of the shaft. As an added advantage, the fiberglass resists abrasion better in wastewater than stainless steel used in the prior art.

Abstract: A water treatment plant for water purification or the removal of organic matter, suspended solids and other pollutants from water or wastewater is formed from multiple sections of polymer that are assembled to form a pre-treatment chamber, a treatment chamber and a settling chamber. The plant is preferably formed of a polymer, such as HMWPE. The treatment chamber is preferably a biofilm-aeration chamber. An outer tank is comprised of first and second upper sections and first and second lower sections secured by mating flanges. A divider baffle forms an inner wall separating the pre-treatment and treatment chambers. A hanging clarifier baffle is formed to be suspended from the outer tank between the treatment chamber and the settling chamber and includes a lower wall with specific angled portions near an angled wall of a lower section of the tank.

Abstract: A composite hollow aspirator shaft is formed of fiberglass-reinforced phenolic resin that resists abrasion and reduces the amount of vibration that is transferred to the motor rotating the shaft, and the motor's bearings to extend motor and bearing life. An aspirator tip is adhesively attached to the composite aspirator shaft and includes an access hole for cleaning inside the hollow aspirator shaft. The hole is in axial alignment with the hollow aspirator shaft and a selectively-removable plug is used to seal the hole during aspirator use. When the aspirator tip is rotated in a liquid, fluidic forces are transferred to the shaft where they are attenuated. A splined hub is used to attach a foam restrictor near the other end of the shaft. The composite shaft material has a flexural modulus, or ratio, within the elastic limit of any applied stress.

Abstract: A trumpet-shaped slinger atomizes or aerosolizes liquid by lifting liquid from adjacent the surface of the liquid using helically oriented fins rotated by spinning the slinger on a shaft. The lifted liquid is centrifugally forced over an increasing surface area and ejected from an upper edge as droplets. When used in wastewater aeration, radial fan blades on top of the slinger break up foam and increase air circulation while the increased surface area of the droplets increases diffusion of dissolved gasses from the wastewater.

Abstract: A composite hollow aspirator shaft is formed of fiberglass-reinforced phenolic resin that reduces the amount of vibration that is transferred to the motor rotating the shaft, and the motor's bearings. This extends motor and bearing life. When the aspirator tip is rotated in a liquid, fluidic forces are transferred to the shaft. Rather than transmitting those forces into the motor and its bearings, the composite aspirator shaft attenuates the forces to prevent most of them from reaching the motor and its bearings. The composite shaft material has a flexural modulus, or ratio, within the elastic limit of any applied stress, and is sufficiently low to allow the transfer of the flexural or oscillatory energy into heat within the shaft instead of conveying the energy in the form of vibration/oscillations along the axial length of the shaft. As an added advantage, the fiberglass resists abrasion better in wastewater than stainless steel used in the prior art.

Abstract: A water treatment plant for water purification or the removal of organic matter, suspended solids and other pollutants from water or wastewater is formed from multiple sections of polymer that are assembled to form a pre-treatment chamber, a treatment chamber and a settling chamber. The plant is preferably formed of a polymer, such as HMWPE. The treatment chamber is preferably a biofilm-aeration chamber. An outer tank is comprised of first and second upper sections and first and second lower sections secured by mating flanges. A divider baffle forms an inner wall separating the pre-treatment and treatment chambers. A hanging clarifier baffle is formed to be suspended from the outer tank between the treatment chamber and the settling chamber and includes a lower wall with specific angled portions near an angled wall of a lower section of the tank.